View Compilation Error

0_0_31156690_22008.cpp: In function 'int main()':
0_0_31156690_22008.cpp:5:27: error: 'scanf' was not declared in this scope
  while(~scanf("%d%d",&x,&y))
                           ^
0_0_31156690_22008.cpp:16:40: error: 'printf' was not declared in this scope
  printf("%10d%10d    Good Choice\n",x,y);}
                                        ^
0_0_31156690_22008.cpp:18:40: error: 'printf' was not declared in this scope
   printf("%10d%10d    Bad Choice\n",x,y);}
                                        ^